58. --- Do you still remember when we went to the Summer Palace? --- I can’t remember it

问题补充：

58. --- Do you still remember when we went to the Summer Palace?

--- I can’t remember it well, but it sometime last July.

A. must have been

B. might be

C. could be

D. might have been

答案：

A. must have been

B. might be

C. could be

D. might have been

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